How many gallons of water do I have

Question:
Square and Circle Pond Calculator PROBLEM..?
I just want to ask how to compute POND SIZE, IDEAL STOCK LEVEL OF FISH, PUMP SIZE and LINER SIZE..???

My inputs are LENGTH(meters),WIDTH(meters),DEPTH(meter… and WATER TURN OVER PER HOUR..


Answer:
For gallons in pond, multiply width x length x depth, then multiply x 7.5 to get gallons.
In a circle, the formula is pi x the radius squared and then multiply x 7.5 for gallons.
A safe bioload is 1 linear foot of fish per 25 square feet of pond surface.
Have a pump moves all the water at least every two hours.

How to figure cubic feet

Question:

This is a working fish pond, with five tier waterfall. Will keep waterfall, and small recovery pool, but want to fill in the majority of pool, which is kidney shaped, 29 to 30 feet wide by 8 feet at widest point, and 7 feet near tips. All depth very close to 4 feet. I need this stable, what is the best filler to use? How to find this answer? There must be a formula to determine the contents of a pool. Just been away from school and math too many years.Thanks.

Answer:
I would use soil, clay even. To figure out how much, multiply width x length x depth to get cubic feet. If you need to, convert that to cubic yards, divide by 27.

To figure out how many gallons of water in your pond again get the cubic feet and then multiply times 7.5 as there are 7.5 gallons of water in one cubic foot.